Before nitrogenous wastes are excreted in
urine, they are converted first to ___ and then
to ___.
a. urea--ammonia
b. ammonia--urea
c. glycogen--monosaccharides
d. glycerin--fatty acids
e. glyerin--urea
A
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Which of the following are incorrectly paired?
a. heroin?premature births and low birth weight b. thalidomide?babies born without toes c. accutane?associated with malformations of the brain d. cocaine?constricts fetal arteries, which leads to retarded development e. cigarette smoking-an addiction to nicotine
The Ames test ________.
A. is used to measure levels of oxygen-free radicals B. can be used to measure the mutagenicity of chemicals C. is used to measure the repair of thymine dimers D. None of the choices are correct.
Abscisic acid enforces dormancy of seeds by
A) waterproofing the seed coat. B) activating gibberellin. C) binding to the molecule ATP. D) preventing endosperm development. E) preventing the development of the embryo and completion of the lifecycle.
Williams syndrome
What will be an ideal response?